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Hyperspectral Cathodoluminescence Examination of Defects in a Carbonado Diamond

Published online by Cambridge University Press:  14 December 2012

Nicholas C. Wilson ,
Colin M. MacRae ,
Aaron Torpy ,
Cameron J. Davidson  and
Edward P. Vicenzi
Nicholas C. Wilson*
Affiliation:
CSIRO Process Science and Engineering, Clayton, VIC 3168, Australia
Colin M. MacRae
Affiliation:
CSIRO Process Science and Engineering, Clayton, VIC 3168, Australia
Aaron Torpy
Affiliation:
CSIRO Process Science and Engineering, Clayton, VIC 3168, Australia
Cameron J. Davidson
Affiliation:
CSIRO Process Science and Engineering, Clayton, VIC 3168, Australia
Edward P. Vicenzi
Affiliation:
Museum Conservation institute, Smithsonian Institution, Suitland, MD 20746, USA
*
*Corresponding author.nick.wilson@csiro.au
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Abstract

Hyperspectral cathodoluminescence mapping is used to examine a carbonado diamond. The hyperspectral dataset is examined using a data clustering algorithm to interpret the range of spectral shapes present within the dataset, which are related to defects within the structure of the diamond. The cathodoluminescence response from this particular carbonado diamond can be attributed to a small number of defect types: N-V0, N2V, N3V, a 3.188 eV line, which is attributed to radiation damage, and two broad luminescence bands. Both the N2V and 3.188 eV defects require high-temperature annealing, which has implications for interpreting the thermal history of the diamond. In addition, bright halos observed within the diamond cathodoluminescence, from alpha decay radiation damage, can be attributed to the decay of 238U.

Keywords

cathodoluminescencecarbonadodata clusteringhyperspectral
Type
Special Section: Cathodoluminescence
Information
Microscopy and Microanalysis , Volume 18 , Issue 6 , December 2012 , pp. 1303 - 1312
Copyright
Copyright © Microscopy Society of America 2012

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